Reland "Request specific ANGLE context versions."
Reland "Request specific ANGLE context versions."

This is a reland of 8eeff5ccf3a35a08d38be5f99b0f08c6171d6838

Original change's description:
> Request specific ANGLE context versions.
> 
> Using the ANGLE_create_context_backwards_compatible extension, request
> explicit ANGLE context versions to make sure test coverage of context
> versions matches Chrome.
> 
> BUG=skia:10309
> 
> Change-Id: Ifa4a36851a0517b369d094e5707348a20eaf3879
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293339
> Reviewed-by: Brian Salomon <61fabaaf0876044aeedfd8e351e485c028d69e7b@google.com>
> Commit-Queue: Brian Salomon <61fabaaf0876044aeedfd8e351e485c028d69e7b@google.com>
> Auto-Submit: Geoff Lang <geofflang@google.com>

Bug: skia:10309
Change-Id: Ida0f226a693354211f35c391bdc0b5bb285a2d3d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293761
Reviewed-by: Brian Salomon <61fabaaf0876044aeedfd8e351e485c028d69e7b@google.com>
Commit-Queue: Brian Salomon <61fabaaf0876044aeedfd8e351e485c028d69e7b@google.com>

aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia